Решить уравнение (tgx)4+(ctgx)4+(tgx)2–(3/4)·(ctgx)2=2
(\frac{sin^2x}{cos^2x})^2+(\frac{cos^2x}{sin^2x})^2+\frac{sin^2x}{cos^2x}-\frac{3cos^2x}{4sin^2x}=2 (\frac{1-cos2x}{1+cos2x})^2+(\frac{1+cos2x}{1-cos2x})^2+\frac{1-cos2x}{1+cos2x}-\frac{3(1+cos2x)}{4(1-cos2x)}=2